I'm only talking of Shimano STI's (up to 10 speed, later versions I don't know as shimano moved away from triple cranksets). These older shifters have a "half click" in the middle; on double you can use it as a "trim" function, on triples as the second click.
I'm only talking of Shimano STI's (up to 10 speed, later versions I don't know as shimano moved away from triple cranksets). These older shifters have a "half click" in the middle; on double you can use it as a "trim" function, on triples as the second click.